338 



AGRICULTURE. 



Bordeaux ''" mixture (see page 341) will be an ef- 

 fective prevention if done in time. 



2. Black Rot i^Lwstadia bidwellii) of the 

 grape (Fig. 124) is a fungous growth which at- 

 tacks nearly or 

 quite grown grapes, 

 beeinninof as a dark 

 spot which spreads 

 over the whole 

 grape, making it a 

 purplish brown 

 color. The grape 

 then shrivels, turns 

 black, and is cov- 

 ered with very mi- 

 nute elevations. 



Just before the 

 fruit ripens, or 

 earlier if the 

 weather is warm 

 and moist, this fun- 

 gous growth is apt 

 to appear, and prompt and frequent spraying 

 should be resorted to. Bordeaux mixture is 

 recommended for earlier spraying ; but it 

 stains the fruit, thus injuring its appearance, 

 when it begins to ripen. The ammoniacal copper 



FIG. 124. — BLACK ROT 

 {Lcesladia bidwellii). 



* " Since the leaves of the peach and plum are sensitive to this 

 spraying mixture, it should be used only in extreme cases." — 

 Wilcox. 



